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Title: Overgrowth Versus Galvanic Replacement: Mechanistic Roles of Pd Seeds during the Deposition of Pd–Pt

Abstract

Here, a systematic study of the roles played by Pd seeds during seed-mediated coreduction of Pd–Pt is presented. Either nanoparticles with porous, hollow architectures or concave nanocubes were achieved, depending on whether the synthesis conditions favored galvanic replacement or overgrowth. Prior works have shown that the galvanic replacement reaction between seeds and a precursor can be suppressed by introducing a faster, parallel reaction that removes one of the reagents (e.g., adatom generation in solution rather than surface-catalyzed precursor reduction). Here, we show that the galvanic replacement reaction depends on the size and concentration of the Pd seeds; the former of which can be manipulated during the course of the reaction through the use of a secondary reducing agent. This insight will guide future syntheses of multimetallic nanostructures by seeded methods, allowing for a range of nanocrystals to be precisely engineered for a variety of applications.

Authors:
 [1];  [1];  [1]; ORCiD logo [1]
  1. Department of Chemistry, Indiana University Bloomington, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
Publication Date:
Research Org.:
Indiana Univ., Bloomington, IN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1432416
Alternate Identifier(s):
OSTI ID: 1482341
Grant/Contract Number:  
SC0010489
Resource Type:
Published Article
Journal Name:
ACS Omega
Additional Journal Information:
Journal Name: ACS Omega Journal Volume: 3 Journal Issue: 4; Journal ID: ISSN 2470-1343
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; deposition process; heat transfer; nanoparticles; physical and chemical processes; physical and chemical properties; redox potential; redox reaction; surface structure

Citation Formats

Ataee-Esfahani, Hamed, Koczkur, Kallum M., Weiner, Rebecca G., and Skrabalak, Sara E. Overgrowth Versus Galvanic Replacement: Mechanistic Roles of Pd Seeds during the Deposition of Pd–Pt. United States: N. p., 2018. Web. doi:10.1021/acsomega.8b00394.
Ataee-Esfahani, Hamed, Koczkur, Kallum M., Weiner, Rebecca G., & Skrabalak, Sara E. Overgrowth Versus Galvanic Replacement: Mechanistic Roles of Pd Seeds during the Deposition of Pd–Pt. United States. doi:10.1021/acsomega.8b00394.
Ataee-Esfahani, Hamed, Koczkur, Kallum M., Weiner, Rebecca G., and Skrabalak, Sara E. Mon . "Overgrowth Versus Galvanic Replacement: Mechanistic Roles of Pd Seeds during the Deposition of Pd–Pt". United States. doi:10.1021/acsomega.8b00394.
@article{osti_1432416,
title = {Overgrowth Versus Galvanic Replacement: Mechanistic Roles of Pd Seeds during the Deposition of Pd–Pt},
author = {Ataee-Esfahani, Hamed and Koczkur, Kallum M. and Weiner, Rebecca G. and Skrabalak, Sara E.},
abstractNote = {Here, a systematic study of the roles played by Pd seeds during seed-mediated coreduction of Pd–Pt is presented. Either nanoparticles with porous, hollow architectures or concave nanocubes were achieved, depending on whether the synthesis conditions favored galvanic replacement or overgrowth. Prior works have shown that the galvanic replacement reaction between seeds and a precursor can be suppressed by introducing a faster, parallel reaction that removes one of the reagents (e.g., adatom generation in solution rather than surface-catalyzed precursor reduction). Here, we show that the galvanic replacement reaction depends on the size and concentration of the Pd seeds; the former of which can be manipulated during the course of the reaction through the use of a secondary reducing agent. This insight will guide future syntheses of multimetallic nanostructures by seeded methods, allowing for a range of nanocrystals to be precisely engineered for a variety of applications.},
doi = {10.1021/acsomega.8b00394},
journal = {ACS Omega},
number = 4,
volume = 3,
place = {United States},
year = {2018},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1021/acsomega.8b00394

Citation Metrics:
Cited by: 2 works
Citation information provided by
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